2 Scrape half the charmoula into a bowl and refrigerate. Scrape remaining charmoula into a large bowl with steak cubes; turn to coat. Let stand at room temperature 2 hours.

3 Light a grill. Cut onion and red bell peppers into 1-1/2-inch pieces. Thread 3 chunks of rib eye each onto long skewers, adding a piece of onion and pepper between each piece of meat. Grill over high heat about 15 minutes, turning skewers occasionally, until meat and vegetables are lightly charred and meat is cooked medium-rare to medium. Serve with reserved charmoula.